1.Two Mist Modes&Light ModesThe portable mini humidifier has two mist modes.Press the button once to continuously spray for 10 hours, and press the button twice to intermittently spray for 12 hours (stop for 2s).Long press the button for the first time to turn on the LED night light; Press the button a second time to switch the LED night light to the breathing light.You can choose the mode according to your needs. 2.Ultrasonic Quite Operation&The Best Choice- Less than 30 dB quiet atmosphere can create a quieter sleeping environment. Humidify your living space to prevent dry, the whisper quiet humidifiers purifier provide fresh and clean air,moisturize the dry skin.It can keeps your living space clean and properly moisturized,you can enjoy moisturize environment leisurely,Ideal for bedroom, living room, office, spa, Yoga. 3.380 ml Large Capacity & Powered by USB & Waterless Auto-Off- The air humidifier with tank capacity is 380 ml, up to 10-12 hours working time. The cool mist humidifiers can be powered by USB cable. 4.A good choice for winter.Very easy to operate and great help in moisturizing the dry air for longer time.